1520763273 has 12 divisors (see below), whose sum is σ = 2206088820. Its totient is φ = 1009489536.

The previous prime is 1520763269. The next prime is 1520763301. The reversal of 1520763273 is 3723670251.

1520763273 is a `hidden beast` number, since 1 + 520 + 7 + 63 + 2 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 570397689 + 950365584 = 23883^2 + 30828^2 .

It is not a de Polignac number, because 1520763273 - 2² = 1520763269 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1520762273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360508 + ... + 364701.

It is an arithmetic number, because the mean of its divisors is an integer number (183840735).

Almost surely, 2^1520763273 is an apocalyptic number.

It is an amenable number.

1520763273 is a deficient number, since it is larger than the sum of its proper divisors (685325547).

1520763273 is a wasteful number, since it uses less digits than its factorization.

1520763273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725448 (or 725445 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 1520763273 is about 38996.9649203627. The cubic root of 1520763273 is about 1149.9718387559.

The spelling of 1520763273 in words is "one billion, five hundred twenty million, seven hundred sixty-three thousand, two hundred seventy-three".